1. To repeat or to double something again: There are some words that reduplicate vowels, syllables, or words in order to create new words or linguistic elements; for example, the following words have parts that are reduplicated: "wishy-washy" and "goody-goody".

The phrase in a music composition is repeated or reduplicated quite often and the listener can usually recognize it each time.

2. To reproduce an element of a word precisely or with a small change: Monika reduplicated some linguistic elements of words to make her short story more interesting and expressive; for example, teeny-weeny, see-saw, and chitchat.
3. To make identical copies of the same thing that has been done previously: The writer of the short autobiography had the printer reduplicate his composition because more people wanted copies than he had anticipated.